Protector for calender-rolls.



W. S. HORNER.-

PROTECTOR FoR CALENDER ROLLS.

APPLICATION FILED MAYII. ISIS.

Patented Nov. 23, 1915.

'WALTER S. HORNER, 0F NASHUA, NEW HAMPSHIRE, ASSIGNOR T0 NASI-IUA CARD Grl'JllfIMEDv & COATED PAPER COMPANY, OF NAS'HUA, NEW ETAM.IES'llI-Illtfll, A COB.-

PORATION 0F MASSACHUSETTS.

PROTECTOR ron cALENnnR-nonns.

Specification of Letters Patent.

Patented Nov. 23, 1915.

Application filed May 11, 1915. Serial 110.21325.

To all whom t may concern;

Be it known that l, NTALTER S` HORNER, of Nashua, in the county of Hillsboro and State of New Hampshire, have invented certain new and useful Improvements in Protectors for Calender-Rolls, of which the following is a speciiication.

This. invention relates to machines for the treatment of paper, and refers particularly to what are known as friction calenders. The invention, however, is applicable to any paper treating machine where it is desirable to render it certain that no foreign particles shall passthrough the machine adhering to the paper.

When paper is being Vcoated and wound into a 'eolil or roll, foreign substances such Vas particles of .hardenedcclor material, and even tacks or nails, are liable to be wound up in the roll or coili The paper treating or linishing rolls are frequently very eX- pensire, and it is quite costly'if such foreign substances passz along and Vinjure the rolls.

This is due not only to the expense of repairs but also to the loss of time in the use of the machine while the repairs are being effected.

My invention consists in the provision of means which, while having no effect whatever upon the paper itself,'will act as a barrier to prevent the passager of any foreign particles or substances.

Of the accompanying drawings, Figure 1 is an end view of suflicient parts of a well-known form o f calendering machine having my improvements applied thereto, to enable my invention to be understood. Fig.' 2 is an elevation from the right of Fig. 1. Figs. 3 and 4 are detail views on a larger scale.

Similar reference characters indicate similar parts in all of the views.

A portion of the frame of the calendering machine is indicated at 12 said frame supporting the friction calender rolls 13, 14, and having brackets 15 to support the supply or unwinding roll of paper a. The brackets 15 are provided with side portions or lugs 1G in which are mounted, preferably adjustably, uprights 17 having bearings for a binder roll or lag 18. Another binder roll or lag 19 is supported by brackets carried by frame 12.

As so far described the machine does not materially differ from a Well-known calendering machine. thev roll 14 of which is usually an expensive one, made of compressed cotton. Ifv any foreign particles adhere, to the surface of paper a, and pass along tothe nip of rolls 13, 14, injury is liablel to result, either to the rolls or to the paper or both.

To prevent the passage of any objectionable particles, I provide a protector bar or bladev 20 which in the machine illustrated in the drawings, is supported by brackets 21 adjustably mounted on extensions of the uprights 17,*said brackets 21 being held in position vvertically on said uprights by meansr of nuts 22. A bolt or screw 23 at each end of the bar or blade 20 is rigidly secured to a flanged upperv edge portion lof thel blade 20, as by having a reduced, portion passing through such frange, and* secured by the nut 24. The two screws 23 pass through apertures in the brackets 21 `and are secured tightly by means of nuts 25 and wing'nuts-26. npractice the bar or, blade 20 is, by means of .the'adjustable connections just described, set so close to the roll 18 that the paper a passing over the roll' 18 willjust clear the lower straight edge of the bar or blade. In other words, the blade must never contact with Vthe paper itself, or the coating thereon, but must serve merelytol arrest, or act as a barrier for, any particles that might adhere to the paper or coating so as to be carried through the machine. The roll 18 and the blade 20 constitute, in effect, opposite walls of a throat through which the paper passes on its way to the treating members of the machine, said throat being narrow (vertically), but slightly exceeding the thickness of the paper and its coating. The edge of the blade 20 is, of course, adjusted so close to the surface of the paper that all projections, such as bits of hardened color or any foreign substances such as tacks, nails, etc., will be removed before the paper passes between.

the expensive finishing rolls. When such substances are not removed, the finishing rolls are liable to take the impression of such substances when they are hard, and this causes a defect which is, of course, impressed in the paper afterward passing over or between the finishing rolls.

Another `advantage of the invention is that f'the paper is composed of webs which are spliced together, with splices of an unusual thickness owing to the end of one web lying on top of the end of the other web, an allowance being also made for the thickness of the paste or glue employed, damage to the rolls due to such thickened portions cannot result because the blade 20 is set at such distance that if kan eXtra thickness of paper comes along, the paper will be automatically torn because the ribbed or eXtra thickness is arrested by the blade 20. Then the only loss of time resulting is due to that which is required for threading up the machine again. The roll or rolls are not damaged.

IVebs of paper quite commonly possess certain wrinkles which, 'by increasing the thickness of the paper, damage the calendering rolls as the splices just described will do. Such wrinkles may run transverse to the web or longitudinal thereof. In either case, however, they are caught by the protector bar or blade 2() and the paper is automatically torn and the roll saved from damage.

It is to be understood that I do not limit myself to the specific form of bar or blade 20, or the particulanmeans shown for adjustably supporting it, or its particular location.

I claim:

1. machine having rolls for the treatment of paper'and provided with a narrow throat for the passage of the paper on its way to said'rolls, said throat being of substantially uniform width from end to end, means being provided to cause the paperto travel with one surface close to but out of contact with one side of the throat.

A machine having rolls for the treat ment of paper and provided with a barrier for holding the barrier rigidly in position to arrest Vforeign substances.

3. A calendering machine having a support over which the paper passes on its way to be acted upon by the calendering members, and a barrier having a straight edge close to said supportbut separated therefrom by a space slightly greater `than the thickness of the paper.

4. A calendering machine having a support over which the paper passes on its way to be acted upon by the calendering members, yand an adjustably mounted barrier having a straight edge close to said support but separated therefrom by a space slightly greater than the thickness of the paper.

5. A calendering machine having a roll yover which the paper passes on its way to be acted upon by the calendering members, and a blade mounted above said roll and having means whereby its edge may be adjustably set relatively to said roll.

6. A calendering machine having a pair of uprights, a roll mounted in said uprights for supporting the paper on its way to be acted upon by the calendering members, said uprights having extensions, said extensions having brackets, and a blade adjustably connected with said brackets.

Invtestimony whereof I have aflixed my signature, in presence of two witnesses.

WALTER S. I-IORNER.

Witnesses:

EDWIN S. GAGE, WALTER L. BARKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

